"Thirty years of research on race differences in cognitive ability" http://psychology.uwo.ca/faculty/rushtonpdfs/PPPL1.pdf It made me realise how political science can be and how facts on large issues can be covered up for political reasons.
You mean all the facts that Ruston left out made you realize that? I hope that's what you mean, as that paper is a dog.
Here's a better paper on closely related topics, by authors who have advanced the research considerably:
Nisbett, R. E., Aronson, J., Blair, C., Dickens, W., Flynn, J., Halpern, D. F., & Turkheimer, E. (2012). Intelligence: New findings and theoretical developments. American Psychologist, 67, 130-159.
doi:10.1037/a0026699
http://people.virginia.edu/~ent3c/papers2/Articles%20for%20O...